1. Application of VLF-EM method for archaeological mapping on an ancient Graveyard in Banda Aceh.
- Author
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Ismail, Nazli, Yanis, Muhammad, and Alfarabi, Syauqi
- Subjects
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CEMETERIES , *RADIO transmitters & transmission , *GEOPHYSICAL surveys , *CULTURAL property , *ARCHAEOLOGICAL excavations - Abstract
Gampong Pande is an ancient village from the first millennium, the area is known as zero km of Banda Aceh Municipality today. Many cultural heritages are found around the area including a complex of ancient graveyards known as diwai by Acehnese. Physically the structure has been destroyed and buried by aging and natural hazards processes, archaeological investigation is needed for conservation. Before archaeological excavation, a geophysical survey of the very low frequency electromagnetic (VLF-EM) method has been applied to image subsurface structures of the ancient graveyard. The VLF-EM data were measured using the GEM-systems console, namely, GSM-19 T. Data measurement was carried out on 20 profiles with a 1 m distance between stations. The length of each profile is 45 meters so that the measurement covered the graveyard area. Magnetic fields in terms of in-phase and out-phase data were measured with frequencies 19.8 kHz and 21.4 kHz propagated by VLF radio transmitters. Based on the data, the area with the graveyard structure is shown by lower in-phase and out-phase values than the area outside the structure. The first derivative of VLF-EM data (i.e., Fraser filter) analysis indicated some elongated buried structures in the subsurface. The structures were further clarified by 2D modeling of the Karous Hjelt filter as the wall of the graveyard was 1 meter to 4 meters. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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